Infiniti F50. Manual - part 10

DESCRIPTION

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DESCRIPTION

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Outline

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The Intelligent Cruise Control (ICC) system automatically maintains a selected distance from the vehicle
ahead according to that vehicle's speed, or at the set speed, if the road ahead is clear.
With ICC, the same speed as other vehicles can be maintained without the constant need to adjust the operat-
ing speed as with a normal cruise control system.
The system is intended to enhance the operation of the vehicle when following another vehicle in the same
lane and direction.
If the distance sensor detects a slower moving vehicle ahead, the system will reduce speed so that the vehicle
ahead can be followed at the selected distance.
The system automatically controls the throttle and applies the brakes (up to 25% of vehicle braking power) if
necessary.
The detection range of the sensor is approximately 390 ft (120 m) ahead.
Refer to Owner's Manual for Intelligent Cruise Control System operating instructions.

System Diagram

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Components Description

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SKIA1202E

Component

Description

ICC unit

Operates ASCD actuator and brake booster based on that sensor signals and CAN communi-
cation data, then controls vehicle distance.

ICC sensor

Irradiate laser beam, and receives reflected laser beam to measure distance from preceding 
vehicle.

ECM

Transmits throttle angle signal to ICC unit.

Brake pressure sensor

Detects fluid pressure in master cylinder.

ASCD actuator

Based on command from ICC unit, adjust throttle valve angle with ASCD actuator, using vac-
uum emerged from vacuum pump.

Brake booster

Adjusts brake fluid pressure, based on command from ICC unit.

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DESCRIPTION

CAN Communication

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CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tric control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

SYSTEM DIAGRAM

INPUT/OUT SIGNAL CHART

T: Transmit   R: Receive

SKIA1241E

Signals

TCM

Combina-

tion meter

Steering 

wheel 

angle 

sensor

ICC unit

ICC sen-

sor

VDC / 

TCS / 

ABS con-

trol unit

ECM

ICC system display signal

R

T

ICC sensor signal

R

T

Engine speed signal

R

R

R

R

T

Engine coolant temperature signal

R

R

T

Accelerator pedal position signal

R

R

T

Engine torque signal

R

R

T

Battery voltage signal

R

T

Closed throttle position signal

R

R

T

Lock-up prohibition signal

R

T

Torque-down permission signal

R

T

Fuel consumption monitor signal

R

T

Lock-up signal

T

R

Hard deceleration signal

T

R

Torque-down signal

T

R

Power mode indicator signal

T

R

A/T fluid temperature warning lamp signal

T

R

R

Current gear position signal

T

R

R

R

R

T

Next gear position signal

T

R

R

Shift change signal

T

R

R

Shift pattern signal

T

R

R

VDC system control signal

T

R

VDC operation signal

R

T

R

Stop lamp switch signal

R

T

Steering wheel angle sensor signal

R

T

R

R

DESCRIPTION

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Switch Operation

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The system is operated by a master ON/OFF switch and four control
switches, all mounted on the steering wheel

ICC System Display

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Air conditioner switch signal

T

R

Headlamp switch signal

T

R

Rear window defogger switch signal

T

R

OD cancel switch signal

R

T

R

Brake switch signal

R

T

Power mode switch signal

R

T

Vehicle speed signal

R

R

R

T

R

T

R

T

R

R

Signals

TCM

Combina-

tion meter

Steering 

wheel 

angle 

sensor

ICC unit

ICC sen-

sor

VDC / 

TCS / 

ABS con-

trol unit

ECM

SKIA1203E

No.

Switch name

Description

1

ON/OFF switch

Master switch to activate the system

2

COAST/SET switch

Sets desired cruise speed, reduces speed incrementally

3

ACCELERATE/RESUME switch

Resumes set speed or increases speed incrementally

4

CANCEL switch

Deactivates system without erasing set speed

5

DISTANCE switch

Changes the following distance from: Long, Middle, Short

SKIA1204E

No.

Component

Description

1

Intelligent cruise control system warning 
lamp (Orange)

The light comes on if there is a malfunction in the ICC system.

2

Vehicle ahead detection indicator

Indicates whether it detects a vehicle ahead.

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DESCRIPTION

3

Set distance indicator

Display the selected distance between vehicles set with the DISTANCE 
switch.

4

Own vehicle indicator

Indicates the base vehicle.

5

ON/OFF switch indicator  lamp (White)

Indicates that the ON/OFF switch is ON.

6

Set vehicle speed indicator

Indicates the set vehicle speed.

No.

Component

Description